Buffer.



v No. 847,357. PATENTED MAR. 19, 1907.

' W. T. B; MODONALD."

BUFFER. APPLICATION FILED 1030.30, 1904.

iinrrnn srafrns earner orrron WILLIAM THOMPSON BROWN MCDONALD, OFGRANBY, QUEBEC, CANADA, ASSIGNOR OF ONE-HALF TO ROBERT GREENE, OFLONDON, CANADA, AND ONE-HALF TO ALICE FLORENCE GREENE MCDONALD, OFGRANBY,

CANADA.

BUFFER.

Specification of Letters Patent,

Patented March 19, 1907.

To a whom it may concern:

Be it known that I, WILLIAM THOMPSON BROWN MCDONALD, of Granby, Provinceof Quebec, Canada, have invented certain new and useful Improvements inBuffers; and I do hereby declare that the following is a full, clear,and exact description of the same.

My invention relates particularly to slidable railroad-buffers; and ithas for its object to provide a slidable buffer capable of presentinggreater resistance to the rollingstock than has been possible heretoforein like appliances.

The invention may be said, briefly, to consist of a pair of slidablemembers adapted to rest upon the rails and to carry a buffer in ahorizontal plane above the wheels of the rolling-stock and adapted toreceive the impact of the latter and transmit it to the slidablemembers.

For full comprehension, however, of the invention reference must be hadto the accompanying drawings, forming a part of this specification, andin which like symbols indicate the same parts, and wherein- Figure 1 isa perspective view of my improved slidable buffer ready for action; andFig. 2 is a longitudinal vertical sectional view thereof, taken on aline extending through the middle. Fig. 3 is a transverse verticalsectional view taken on line A A, Fig. 2.

The preferred embodiment of my invention consists of a pair oflongitudinal members b b of substantially channel form, having boltedthereto near one end a bracket 0, supporting a yielding buffer (Z abouton a level with the lower portion of each end of locomotives and freightand other cars.

The bracket is preferably cast with a flange 4 f at each end and alongitudinal depression 9 of semicircle form, which terminates at itsrear end in an abutment-block h. A semicircular plate 4;, having flangesalong its sides, is secured, through its flanges by bolts k, to themiddle portion of the bracket in position to cover the depression 9 andform therewith a cylinder having one end closed by the block It.

A buffer carried by the bracket and consisting of an eXpansible helicalspring m is located in the cylinder, its outer end bearing in a cuppedpiece a, slidably mounted in the outer end of such cylinder, and a rod0, carried rigidly by the inner end thereof, projects through a boring pin the block it, through i which its movement in one direction islimited by a split cotter-pin g.

The longitudinal members I) b have lugs r struck out fromtheir adjacentsides, to which a series of braces s are bolted, the whole being lockedto the rails by bars t, adjustably secured to the under sides of thebraces s by bolts u and adapted to be projected beneath the heads of therails, in which positions they are secured by such bolts.

The position of the point of my improved device upon which impingementtakes place causes the weight of the body of the locomotive or the likecoming in contact therewith to be transmitted directly to thelongitudinals, and owing to the greater incline of the forward portionof the bracket such weight will be distributed over a greater trackarea.

What I claim is as follows:

1. A railroad-buffer adapted to have the rolling-stock ride upon thesame and consisting of a member resting permanently slidably upon therails, such member supporting a buffer proper on a level with the bodyof the rollingstock, and means bracing the said buffer against the shockof the rolling-stock.

2. A slidable railroad-bhfier consisting of a member comprising a pairof longitudinals resting permanently slidably upon the rails, a bracketsecured rigidly to one end of the said members and projecting upwardlyto a point on a level with the body of the rollingstock and to a pointin a vertical line a short distance from the said end, means securing abuffer proper to the said bracket, and means bracing the bracket againstshock from the rolling-stock.

3. A slidable railroad-buffer consisting of a member comprising a pairof longitndinals adapted to rest slidably upon the rails and meanssecured rigidly to the said members and projecting upwardly to a pointon a level with the body of the rolling-stock and in vertical line witha point a short distance from the said end, such means supporting abuffer at its upper end and means bracing the said buffer against theshock of the rolling-stock.

4. A slidable railroad-buffer consisting of a member comprising a pairof longitudinals adapted to rest slidably upon the rails and a bracketsecured rigidly to one end of the I said members and projecting upwardlyto a- In testimony whereof I have signed my point on a level with thebody of the rollingname to this specification in the presence of stock,such bracket being formed at its upper two subscribing witnesses.

end with a cylinder, having one end closed, a WILLIAM THOMPSON BROWNMcDONALD. slidable block located in the opposite end and Witnesses:

a spring bearing between such closed end and J. L. Dozm-s,

the slidable block. GEO. T. DORIM.

